错，得，好，冤！

没加freopen错了

上代码

#include <bits/stdc++.h>
using namespace std;
long long n, k, e, d, m, p, q;
int main(){ 
	freopen("decode.in", "r", stdin);
	freopen("decode.out","w",stdout);   
    cin >> k;
    while(k--){
        cin >> n >> d >> e;
        long long m = n - e*d +2;
        long long l = 1, r = m/2, p, q;  // p <= q  所以 p <= m/2
        while(l <= r) {
            p = (l + r) / 2;
            q = m - p;
            if(n == p*q) {  // 在 p 的值域范围内，p*q 是单调递增的
                break;
            } else if(n < p*q) {
                r = p - 1;
            } else {
                l = p + 1;
            }
        }
        if(n == p*q) {
            cout << p << ' ' << q << '\n';
        } else {
            cout << "NO\n";
        }
    }
    fclose(stdin);
    fclose(stdout);
    return 0;
}